Squeezing bigger crop yields out of the soil by just upgrading to larger, heavier, more powerful machines doesn’t look sustainable. Up to 90% of the energy used in crop cultivation is wasted on dealing with the damage caused by the cultivation equipment itself

The educational world, terrified by Massive Open Online Courses, is putting on a brave, smiling face and joining in, because it sees them as unstoppable and hopes it can somehow survive and even benefit from them